The tumor markers of this patient were all negative, including carbohydrate antigen 724, cytokeratin 19 fragment, carcinoembryonic antigen, carbohydrate antigen 242, carbohydrate antigen 125, neuron-specific enolase, alpha-fetoprotein, free human chorionic gonadotropin, squamous cell carcinoma antigen, total prostate-specific antigen, free prostate-specific antigen, and carbohydrate antigen (199). Here, KLK3 is linked to neoplasm.